Figure 4. Subjects with unlikely abruptions.

Subject 16 progresses through a typical volatile mix of Bacilli, Clostridia, and Gammaproteobacteria, but at day 29 this is replaced by 100% unclassified bacteria. Subject 55 has an unusual mix of rare bacteria taxa initially, but this is entirely replaced by Bacteroidia subsequently. On the second axis, the yellow line shows the posterior likelihood of the data conditioned on the previous sample, in negative log scale.